Trip hammer



A ril 14, 1925. 1,533,567

. W. C. NICOL l TRI P HAMMER Filed Oct. 2, 1923 v 2 Sheets-Sheet l 2Sheets-Sheet 2 s April 14', 1925. y

JEA

Patented Apr. 14, 1925. I I

UNITED STATES PATENT OFFICE;

WILLIAM C. NICOL, or EVERETT, WASHINGTON, ASSIGNOR E ONE-HALF To ALEXAN-DER G. PASCHKE, or EVERETT, WASHINGTON.

TRIP HAMMER,

Application filed October 2, 1923. Serial No. 666,147.

To all whom it may concern: Figure'2 is a side elevation of the same. Beit known that I, VVILLIAM C. NIooL, Figure 3 is a detail section takenon the a citizen of the United States, residing at line 33 of Figure 1and Everett, 'in the county of Snohomish and Figure 4 is a detailhorizontal section 55 5 State of Washington, have invented certain takenon the line of Figure 1.

new and useful Improvements in a Trip Referring to the drawings in"detail, Hammer, of which the following is a speciwherein similarreferencecharacters desigfication. nate corresponding parts throughoutthe a This invention "appertains' to power maseveral views, the letter Agenerally indichinery and morefparticularly to trip hamcates theimproved hammer, which commers used for forging or like purposes prisesthe supporting post or standard 5, where quick even blows are essentialand which can be formed of any desired matethe primary object of theinvention is the rial, suchas wood or iron. The upper end provision ofan automatically operated trlp ofthe post 5has bolted or' otherwisesecured 65 hammer embodying novel means for quickly thereto atoneside'face thereof the upstandsetting the trip hammer in operation anding supplemental supporting post 6; Difor bringing about the effectiveand instant rectly below the supplemental supporting stopping thereof;post 6 and in spaced relation thereto is .ar-

A further prime object of the inventlon ranged a supporting bed 7, whichis also 70 is the provision of a trip hammer embodybolted to one sideface of thejmain su ing a-drive shaft, operatively connected to portingpost or standard 5. This bed 7 the hammer through the mediumof a crankhas secured thereto the anvil supporting andpitman and novel means forbrlnglng' standard 8, to which is aflixed the anvil 9, the drive shaftinto operation and means which can be of any preferred type. The 75 forbringing a brake band from out of enfront face of the supporting post 5can gagement with the shaft,- said means also carry any preferred typeofbracket 10 forpermitting the releasing of the drlve shaft receivingdifferent kinds ofswedges, so that and the setting of the brake, when ltlS the swedges can be moved into engagement desired to bring about theinst-ant stopplng with the active face of the anvil 9. 80 of the hammerrThe lower end of the supplemental sup- A further object of the invention1s the port, or post 6 carries the guide 11 for the j provision of novelmeans for resiliently conhgn1n1er.pr0per 12 hi h in l d th thi nectingthe crank with the hamm r, shank 18 reciprocably mounted in the guide.by giving an elastic, movement to the ham- 11' and the hammer head 14:,which is dis- B5 mer, the throw of the crank and the glve posed di tlabove th il 9.

0f the spring transmitting-to the hammer The guide 11 includes pairs ofspaced a quick and powerful move 'guide plates 15 and the platesof eachpair A still further object of the invention is of guide plates are heldin spaced relation, to provide a trip hammer of the above b spacing l t16, The Spacing l t 90 40 character, which will be dura le and ef 16 areadjustable toward the hammer shank cient in use, one that will be simpleand 13 in order to take care of wear and to easy to manufacture, and onewhich can be prevent any slip between the guide and placed upon themarket at a small cos I hammer. The adjusting means includes a Withthese and other objects in view, the horizontal bolt 14 having nuts 15'threaded 95 invention consists in the novelconstruction, on itsterminals for engaging the follower arrangement and formation of parts,as willplates 16, which bear against the outer ends be hereinafter morespecifically described, of the spacing plates 16. The guide 11 canclaimed and illustrated in the accompanybe bolted to a suitablesupporting face plate ing drawings, in which drawings: Figure 1 is afront elevation of the impost 6, so as to permit the, guide 11 tobeproved trip hammer. held away from the face of the supporting,

17, carried by the supplemental supporting post. The extreme upper endof the supplemental supporting post 6 can be bolted or otherwise securedto a suitable ceiling joist 18 or the like and the upper end of thispost carries a rotatable drive, shaft 19, one end of which has securedthereto the operating crank 20 and the other end a brake drum 21, whichreceives the brake The crank 20 carries a depending pitman rod 26, whichis in turn connected by means of a clevis 27 or the like to the centralportion of a semielliptical 'leaf spring 28, the terminals of whichcarry links 29. The

links 29 are fixed to their opposite sides of the shank 13 of the hammer12 proper.

It is obvious that when the crank 19 is operated by the belt'24, thehammer proper 12 will be quickly raised and lowered and owing to thelinks 29 and the spring 28, a quick and effective blow will be deliveredto the anvil at each throw of the crank arm.

1 The belt 24 is a loose belt and normally the same will not rotate thepulley 23 and in order to bring about the drive of the pulley 23from thebelt24, the said belt must be tightened.

In order to bring about the tightening of thebelt, I provide a swingingframe 30 rtatably mounted upon one side face ofthe supplementalsupporting post orbeam 6,

as at 31. The upper end of the swinging .Jelt 24, thus bringing aboutthe tightening frame carries an idler pulley 32 for engaging the belt24. A rearwardly extending operating arm or lever 33 is rigidly formedon the frame 30 at a point spaced from its pivot 31'and this arm orlever 33 has secured thereto an operating or pull chain 34, whichextends down toward the base of the trip hammer. This chain 34 isinserted through a suitable ring 35 carried by the treadle 36 and thelower end of the chain 35 is rigidly bolted or otherwise secured tothestandard 5, as at 36. It is obvious that when the treadle 36 isthrown downward by the foot, that the lever 33 will be moved downward,thus bringing the idler pulley 32 into forcible contact with thethereof, and the consequent rotation of the. shaft 19. When the footpedal 36 is released, the same will be moved to a raised position "bythe use of a contractile coil spring 37 secured at one end to thetreadle and to the opposite end to the bed 7, as at 38. The lever 33will also be returned to its normal position upon the release of thepedal 36 by means of a contractile coil spring 39, the lower end ofwhich is connected to the lever and the opposite endto the ceiling joist18.

In order to bring about the quick and positive stopping of the triphammer 14 when the treadle 36 is released, I connect the brake band 22to the swinging frame 30 by means of a rod 40 and it is obvious, thatupon release of the frame, the same will swing away from the post 6 andthus exerting a pull on the brake band 22 which will act upon the brakeband 21 and stop the operation of the shaft.

lVhen the frame 30 is operated by the treadle for tightening the belt24, it can be seen that the frame 30 will move inwardly toward the post6, thus loosening the brake band 22 and permitting the rotation of theshaft 19.

The treadle 36 can be of any desired construction, and as shown the sameconsists of a pair of parallel arms 42 and a transverse foot bar 43. Thearms 42 being'pivoted as at- 43 to any preferred type of support.

From the foregoing description, it can'be seen that I have provided anexceptionally simple and durable power trip hammer, which willeffectively accomplish the pursame to occupy a minimum amount of spacein a shop and it can be seen that the same will only take up an area ofa shop equal to the area of the lower face of the support ing posts 6and 7 and the iron block 8.

Changes in details may be made without departing fromthe spirit or thescope of this invention.

What I claim as new is:

1. A power trip hammer comprising a supporting post, an anvil block, ananvil secured to the block, a supplemental supporting post secured toone side face of the main supporting post, a guide carried by thesupplemental supporting post, a reciprocatory hammer head mounted insaid guide, bearings carried by the supporting post, a rotatable driveshaft mounted in the bearings, and a crank carried by one end of thedrive shaft, a pitman connected with the crank, a semi-elliptical leafspring secured to the pitman rod, links connecting the terminals of theleaf spring with the pose intended. The trip hammer is also formed witha purpose in view, to allow the upper end of the hammer head, a drivepulley secured to the drive shaft, a brake drum secured to the driveshaft, a brake band for the drum, a frame 'pivotally connected with thesupplemental post, an idler pulley connected with the frame for engagingthe drive belt, means connecting the-brake band with the swinging frame,an operating lever secured to the frame at one side of the pivot, meansfor normally holding the frame away from said post and the idler pulleyout of operative contact with he drive pulley belt and the brake band inoperative braking engagement with the brake drum, a foot treadle carriedby the lower end of the supporting post, means operatively connectingthe lever with the foot treadle, and means for normally holding the foottreadle in a raised position.

2. In a power trip hammer, a supporting post, an anvil block carried bythe post, an anvil secured to the block, a guide associated with thepost including a pair of spaced plates disposed on each side of thelongitudinal center of the post, a reciprocatory hammer including arelatively thin fiat shank slidably mounted between the plates of thepair of plates, a crank shaft, means operatively connecting the crankshaft with the shank of the hammer, spacing plates disposed between theplates of the pair of plates, and means for adjusting 30 WILLIAM o.NICOL.

Witnesses:

ALG. PASCHKE, Jnssn W. WILLIANS.

